Follow up higher-spectral resolution observations revealed
five Gaussian components in the HI absoprtion spectrum of
Abell 2390. The peak absorption is ~7.5 % of the
observed continuum surface brightness of the cluster with
the 3.3-arcmin Arecibo beam. The derived HI column density
is NH ~3 \times 1019 Ts/f cm-2, where
Ts is the HI spin temperature and f is the covering
factor of the continuum emission by the neutral gas. With
the broad Arecibo beam it is impossible to say against which
continuum component/s the HI absorption occurs; hence, f
is presently unknown.

We have also imaged the L-band continuum emission of the
Abell 2390 using VLA A-array archival data. Within the
well-known distributed continuum emission of the cluster, we
found nine discrete sources on the arcsec scale, including
the central cD galaxy.

Future GMRT and WSRT synthesis observations will allow us to
map the distribution and the kinematics of the neutral
hydrogen in this cluster at a higher spatial resolution.
These observation will allow a detailed investigation as to
whether the cool neutral gas is associated with one or more
individual galaxies, or is a distributed intra-cluster
phonomenon.

The Arecibo Observatory is part of the National Astronomy
and Ionosphere Center, which is operated by Cornell
University under a cooperative agreement with the National
Science Foundation.